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/* xscreensaver, Copyright (c) 2013-2018 Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* XScreenSaverUpdater.app -- downloads and installs XScreenSaver updates
* via Sparkle.framework.
*
* Created: 7-Dec-2013
*
* NOTE: This does not work with Sparkle 1.5b6 -- it requires the "HEAD"
* version 4-Dec-2013 or later.
*/
#define IN_UPDATER
#import "Updater.h"
#import "Sparkle/SUUpdater.h"
@implementation XScreenSaverUpdater : NSObject
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];
[defs registerDefaults:UPDATER_DEFAULTS];
// If it's not time to run the updater, then bail immediately.
// I'm not sure why this is necessary, but Sparkle seems to be
// checking too often.
//
if (! [self timeToCheck])
[[NSApplication sharedApplication] terminate:self];
// If the screen saver is not running, then launch the updater now.
// Otherwise, wait until the screen saver deactivates, and then do
// it. This is because if the updater tries to pop up a dialog box
// while the screen saver is active, everything goes to hell and it
// never shows up. You'd expect the dialog to just map below the
// screen saver window, but no.
if (! [self screenSaverActive]) {
[self runUpdater];
} else {
// Run the updater when the "screensaver.didstop" notification arrives.
[[NSDistributedNotificationCenter defaultCenter]
addObserver:self
selector:@selector(saverStoppedNotification:)
name:@"com.apple.screensaver.didstop"
object:nil];
// But I'm not sure I trust that, so also poll every couple minutes.
timer = [NSTimer scheduledTimerWithTimeInterval: 60 * 2
target:self
selector:@selector(pollSaverTermination:)
userInfo:nil
repeats:YES];
}
}
- (BOOL) timeToCheck
{
NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];
NSTimeInterval interval = [defs doubleForKey:@SUScheduledCheckIntervalKey];
NSDate *last = [defs objectForKey:@SULastCheckTimeKey];
if (!interval || !last)
return YES;
NSTimeInterval since = [[NSDate date] timeIntervalSinceDate:last];
return (since > interval);
}
// Whether ScreenSaverEngine is currently running, meaning screen is blanked.
// There's no easy way to determine this other than scanning the process table.
//
- (BOOL) screenSaverActive
{
BOOL found = NO;
NSString *target = @"/ScreenSaverEngine.app";
ProcessSerialNumber psn = { kNoProcess, kNoProcess };
while (GetNextProcess(&psn) == noErr) {
CFDictionaryRef cfdict =
ProcessInformationCopyDictionary (&psn,
kProcessDictionaryIncludeAllInformationMask);
if (cfdict) {
NSDictionary *dict = (NSDictionary *) cfdict;
NSString *path = [dict objectForKey:@"BundlePath"];
if (path && [path hasSuffix:target])
found = YES;
CFRelease (cfdict);
}
if (found)
break;
}
return found;
}
- (void) saverStoppedNotification:(NSNotification *)note
{
[self runUpdater];
}
- (void) pollSaverTermination:(NSTimer *)t
{
if (! [self screenSaverActive])
[self runUpdater];
}
- (void) runUpdater
{
if (timer) {
[timer invalidate];
timer = nil;
}
SUUpdater *updater = [SUUpdater updaterForBundle:
[NSBundle bundleForClass:[self class]]];
[updater setDelegate:self];
// Launch the updater thread.
[updater checkForUpdatesInBackground];
// Now we need to wait for the Sparkle thread to finish before we can
// exit, so just poll waiting for it.
//
[NSTimer scheduledTimerWithTimeInterval:1
target:self
selector:@selector(pollUpdaterTermination:)
userInfo:updater
repeats:YES];
}
// Delegate method that lets us append extra info to the system-info URL.
//
- (NSArray *) feedParametersForUpdater:(SUUpdater *)updater
sendingSystemProfile:(BOOL)sending
{
// Get the name of the saver that invoked us, and include that in the
// system info.
NSString *saver = [[[NSProcessInfo processInfo] environment]
objectForKey:@"XSCREENSAVER_CLASSPATH"];
if (! saver) return @[];
NSString *head = @"org.jwz.xscreensaver.";
if ([saver hasPrefix:head])
saver = [saver substringFromIndex:[head length]];
return @[ @{ @"key": @"saver",
@"value": saver,
@"displayKey": @"Current Saver",
@"displayValue": saver
}
];
}
- (void) pollUpdaterTermination:(NSTimer *)t
{
SUUpdater *updater = [t userInfo];
if (![updater updateInProgress])
[[NSApplication sharedApplication] terminate:self];
}
- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)app
{
return YES;
}
@end
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